Ukuba ukhe wasebenzisa i-RF (i-radiored) yonxibelelwano, uthungelwano lweselula, okanye iinkqubo ze-eriyali, unokudibana negama legama le-LMR. Kodwa yintoni kanye kanye kwaye kutheni isetyenziswa kakhulu? Kweli nqaku, siza kuphonononga ukuba yeyiphi intambo ye-LMR, iimpawu eziphambili zayo, kwaye kutheni le ndlela ikhethiweyo yezicelo, kwaye uphendule umbuzo 'Yintoni i-LMR ye-LMR?'.
Qonda intambo ye-LMR coaxial
Intambo ye-LMR yintambo ye-chiaxial yenzelwe ukusebenzela kakhulu, ukulahleka kwelahleko ephantsi kwizicelo ze-RF. Iintambo ze-LMR zenziwa ngamaxesha eenkqubo zeMicrowae kwaye zidume ngenxa yelahleko yazo ebalaseleyo, kunye nokuqina, ukubenza balungele i-GPS yonxibelelwano ngaphandle kwamacingo, ukhetho olufanelekileyo lwe-radar kunye nezinye iinkqubo ezisekwe kwi-radar kunye nezinye iinkqubo ezisekwe kwi-radar kunye nezinye iinkqubo ezisekwe kwi-RF. Ngokungafaniyo ne-cobs ye-coaxial yendabuko, iintambo ze-LMR zenziwe ngeendawo ezininzi zokukhusela izikhuselo kunye nezidlo zediliya ukuqinisekisa ukuthembeka kwesibonakaliso. Beza ngobungakanani obahlukeneyo ukuba bakhethe, njenge LMR-195, lmr-240, lmr-600, kunye ne-LMR-600, kunye ne-LMR-600, yenzelwe iimfuno ezahlukeneyo zokunciphisa amandla kunye neemfuno zelahleko.
Iimpawu eziphambili ze-LMR Coaxial Cable
Iintambo ze-LMR zivele kwicandelo lee-coaxial calbs ngenxa yolwakhiwo lwazo ezikhethekileyo kunye nezibonelelo zentsebenzo:
1. Ilahleko ephantsi
Esona sibonelelo sibaluleke kakhulu se-LMR yeentambo ezilahlekileyo eziphantsi kukuthathwa kweetayile eziphantsi kakhulu kwindiza emide (ilahleko yomqondiso). Oku kufezekiswa ngokufakelwa okumgangatho ophakathi kunye nokukhusela, okunciphisa ukulahleka kwamandla xa imiqondiso idlula kwiintambo.
2. Umsebenzi obalaseleyo wokukhusela
Uyilo lwentambo ye-LMR lunemigca emininzi yokukhusela, ngokuqhelekileyo kuquka ukukhuselwa kwealuminiyam ye-ALMIP YOKUKHUSELEKILEYO KWE-EMI (i-electromagnetic yokuphazamiseka) ukhuseleko. Ukuluka ukhuseleko lwangaphandle lukhule kwaye lunciphisa ukuphazamiseka. Oku kukhuselwe kuqinisekisa imiqondiso eyomeleleyo necacileyo ye-LMR ye-lernes ukhetho olufanelekileyo lwezicelo ezibuthathaka ze-RF.
I-3. Ukuqina kwemozulu
Iinkqubo zemicrowave iinkqubo zemicrowave ivelisa iintambo ze-LMR, i-sheath engaphandle yenziwa nge-polyethylene (PE) okanye i-EREASTIMERTOMER (TRE), eyenza ukuba ixhathise umthamo we-ultraviolet, ubushushu obukhulu kunye nobushushu obugqithisileyo. Abanye abantu abangafaniyo, njenge-LMR-UF (i-Ultra Flex), unikele ukuguquguquka okungapheliyo zokufakelwa okufuna ukugoba rhoqo kunye nokuhamba.
I-4. Ukufakelwa kokufakelwa kunye nokulula
Xa kuthelekiswa neentambo ze-quaxial zemveli, iintambo ze-LMR zinobutshaba okuphezulu kwaye zilula, ukwenza lula. I-radius yabo i-radius incinci kakhulu kunezo zeentambo ze-RF ezifanayo, ezivumela ukufakwa ngokuqinileyo kwiindawo ezivalelweyo.
I-5. Ukuhambelana nesinxibelelanisi se-RF
Iintambo ze-LMR ixhasa izifundo ezininzi, kubandakanya izifundo zohlobo lwe-N I-SMA Connector (yeenkqubo ezingenazingcingo kunye nee-GPS). Umnxibelelanisi we-BNC (odumileyo kusasazo kunye nenethiwekhi). Oku kuyabenza bubenze babe ngohlobo lweshishini kumashishini ahlukeneyo.
Ukusetyenziswa okuqhelekileyo kweentambo ze-LMR
Ngenxa yokusebenza kwayo ngokugqibeleleyo, iintambo ze-LMR zisetyenziswa ngokubanzi kumashishini axhomekeke kunxibelelwano lwe-rf. Ezinye zezona zicelo ziqhelekileyo zibandakanya uthungelwano olungenazingcingo kunye neesello kunye neenkqubo ze-RF, i-GPS kunye nonxibelelwano lwesatellite, iinkqubo ze-aerospace, ukubeka iliso kunye neenkqubo zokubeka iliso.
Khetha intambo ye-LMR efanelekileyo
Ukukhethwa kohlobo oluchanekileyo lwentambo luxhomekeke kwizinto ezininzi, kubandakanya ne-freequency, umgama, ukuphatha amandla, kunye neemeko zokusingqongileyo. Nazi ezinye iindlela eziqhelekileyo:
I-LMR-195 kunye ne-LMR-240: Ilungele izicelo ezifutshane zabasebenzi ezifana ne-fi fi infonnas kunye neenkqubo ze-GPS.
I-LMR-400: Inkqubo ephantsi elahlekileyo ephakathi yokusetyenziswa isetyenziswe kwiiselula zeselula kunye neendlela ezimbini zerediyo.
I-LMR-600: ilungele kakhulu usetyenziso lomde apho ilahleko yomqondiso kufuneka incitshiswe kakhulu.
Ukuba ufuna ukuguquguquka kwezicelo zeselula, i-LMR-UF (i-Ultra Flex) Intambo kukhetho olufanelekileyo.
Ixesha lokuphumla: Mar-13 ukuya ku-525